Answer:
283 or 382
Step-by-step explanation:
The number of children in 1st grade has 3 digits.The digit in the number are 2,3,and 8 .
Since the digit 8 means 80 in the number. The other two numbers could interchange the Hundred and Unit position respectively.
The possible numbers are:
I. 200+80+3=283
II. 300+80+2=382
The possible number of children in 1st Grade is either 283 or 382.
Answer:
z-test.
Step-by-step explanation:
We want to perform an hypothesis test for a population mean.
In the case that the <u>standard deviation of the population is known</u> and the population distribution is normal, even if the sample is small, <u>we will use a z-test</u>.
The usual case is to not know the standard deviation of the population, in which case a t-test is adequate instead of a z-test, taking into account the degrees of freedom of the sample.
Hey!
Myles had 185 songs. He purchased 30 extra songs.
30 ÷ 185 = 0.162 = 16.2%
Answer ⇒ 16.2%
Hope this helps! :)
<span>This is the term used to describe economic systems in which the basic economic questions are answered based on a socially, pre-established way.</span>
Answer:
B
Step-by-step explanation:
distribute
5x+15-9x+4
combine like terms
-4x+19
